From Photoshop

This is our primary separation program for all raster art, detailed
color blends, and photo realistic art. It's also what we use to
manually create simulated process separations, index separations, and
four color process separations.

TO OUTPUT SEPARATIONS IN PHOTOSHOP:

1. Open
the file and click the 'WINDOW' > 'Channels' to view the channel
selections. This is where you will find the separation plates.

Each
plate is labeled. Turn on all the eyes from the "tee" channel to the
last numbered plate and see what the separation plates look like when
working together. Similar to the color comp. Click on each eye individually to see what each plate
looks like.

3.
In Photoshop CS3 and CS4 you can check your settings in the print
window (when you press PRINT). Under 'OUTPUT' turn on: registration
marks, center crop marks, and labels.

2.
When you're ready to print, click on the first plate so you can see
what the screen looks like. Then proceed with the steps below. You
will click on each plate and print.

4. Click the 'SCREEN' button: turn off the Printer's Default Screen.
This will give you access to each plate & list the frequency (DPI),
angle, and dot shape. We recommend a 55-65lpi,
and 45 degree angle, with elliptical dot. Click to turn on Accurate
Screens, and Same Shape for All Inks. Then save your settings.Now you're ready to print each pate!